public class Base {
    int a = 10;
    int b = 20;
    int c = 30;
    public Base(){
        System.out.println("Base()");
    }
    public void methodA(){
        System.out.println("Base中的methodA()");
    }
    public void methodB(){
        System.out.println("Base中的methodB()");
    }
}
